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Oksanka [162]
3 years ago
15

Mrs. Sahd distributes pencils and papers to students in the ratio of 2 pencils to 10 sheets of paper. Three of these ratios are

equivalent to 2/10. which one is not? a. 1/5 b. 7/15 c. 4/20 d. 8/40?
Mathematics
1 answer:
IRINA_888 [86]3 years ago
5 0

The ratio that is not equivalent is B. 7:15

The reason why it's not equivalent because for the other ratios:

1:5 could be turned into 2:10 by multiplying 1 and 5 by 2.

4:20 could turn into 2:10 by dividing both numbers by 2.

And 8:40 could be divided by 4 to get 2:10.

But you can't do anything to 7:15 to make it 2:10.

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Identify the initial value in each formula below, and state whether the formula models exponential growth or
Hitman42 [59]

Answer: Hello mate!

the equation is written is:

f(t) = 2 / 3 (3)t

And is hard to work with this, but let's try:

I will interpret this function in two ways:

f(t) = (2/3^(3t)) in this case, the exponential part is in the denominator, so when t increases, the denominator also increases, if the denominator increases, the value of the function decreases, then, in this case, we have an exponential decay.

second case:

f(t) = (2/3)^(3t) the case is similar.

we know that 2/3 < 1

now, (2/3)^3t = (2^3t/3^3t)

3 is a number bigger than 2, then 3^3t > 2^3t, meaning that when t increases, bot denominator, and numerator increases, but the denominator increases faster, this means that we still have an exponential decay.

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3 years ago
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STALIN [3.7K]
Multiply 11 yards by 7 yeards and you will get ur answrr
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1 year ago
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bekas [8.4K]
Answer:
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General Formulas and Concepts:
- Reading a Cartesian Plane
The y-intercept is the y-value when x = 0. It is also when the graph crosses the y-axis.
Step-by-Step Explanation:
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Answer:

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Step-by-step explanation:

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\bf \textit{parabola vertex form with focus point distance}&#10;\\\\&#10;4p(y- k)=(x- h)^2&#10;\qquad&#10;\begin{array}{llll}&#10;vertex\ ( h, k)\\\\  p=\textit{distance from vertex to }\\&#10;\qquad \textit{ focus or directrix}&#10;\end{array}&#10;\\\\[-0.35em]&#10;\rule{34em}{0.25pt}\\\\&#10;\begin{cases}&#10;h=0\\&#10;k=2\\&#10;p=-2&#10;\end{cases}\implies 4(-2)(y-2)=(x-0)^2\implies -8(y-2)=x^2&#10;\\\\\\&#10;y-2=\cfrac{x^2}{-8}\implies \blacktriangleright y=-\cfrac{1}{8}x^2+2 \blacktriangleleft

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